f^ rNE^^Mes^rs. Playfair a7id Joule on '^^ 



8niB-.§g(^. NH4O, C2 O3 + HO, vol. in solut»ij'^8©B 8'tl 

 35*71 grains, being immersed in a saturated solutidW,' gS.v^ 

 in the first experiment an increase of 24*5, in the second of 

 24*4 ; ^tiie first experiment being at 48°, th€ second ali 50°. 



''.- " Spi gr. 



I.'^NH40, C2 O3 f HO, vol. of salt 49-0 ... 1*458 



US-'^ .»' ^"*'i/i ... 48^8 ... 1*464 



'^'iBinowalate of Potash, KO, C2O3 + HO, CgOg + 2HO =i±i 

 146*63. — To determine the volume of this salt, 18*33 graini^ 

 were dissolved in 1000 grains of water with a rise of 6*8 at a 

 temperature of 57° ; and the same result attended a repetition 

 of the experiment ; in a third experiment, 25 grains at the 

 same temperature caused an iuprease of 9*0. 

 /waLII. Binoxalate, of/ potash, vol, in solution 54*4 ,, 



i\m eiriilo 9raijloY oxli 8b g-Bt «9 .'^("B'jj? Jv^o a^co-iq 



Half an equivalent of the salt (73*31 grains), being immersed 

 in a saturated solution, caused an increase of 37'4 in the first 

 experiment, and of 37'2 in the second, the temperature 1^9 

 both cases being 55°. :^ 



OHi^ , . > ^P-g''- 



'^PK-vJ^nPiiioxalate of potash, vol. of salt 74;8 ... 1*960 



•ainstg 81 rioiltt/ ni ^ia^fnixoflxs'tinooflg c t^ ; °0P „-Z- >o 

 ^0 9aB8T3ni M.' , Mean . . 74*6 - ... 1*965 ,^ 



Oxalate of Copper and Potash, KO, Cg O3 4- CuO, C2 G!^ 

 + 2HO = 177'25. — On account of the sparing solubility of 

 this salt, 11*08 grains, or the sixteenth part of an equivalent, 

 were dissolved in water, and caused an increase of 3*4 in two 

 experiments at a temperature of 59°. 



I. II. KO, C2 O3 4- CuO, Cg O3 4- 2HO, vol. in solution 54*4 



'The fourth of an equivalent (44*3 grains), placed in a satu- 

 rated solution, caused an increase in one experiment of 19*6 ; 

 in another of 18*9 ; and in a third of 19*7 j all at a temperature 

 ^Vttrying fi*om 54° to 57°* ^xiiiit^Ok guiviuijaibjuO— ,Gi-i?c^ - 



:.'!' .Z'V) >j '-.i:,'ji:;)ni -jdi POT. h: •I'liiSp.'Sr. 



I. Oxalateof copper and potash, vol, of salt 78*0 ... 2*272 



lA. ., ,,i, »»^iy,c -J v J i..»«'u (M.I ;!_._■ ,j^ft»; .Jill lu ilP'Pi .'J'"- ■*'"44 



III. ,a*8£ 'ia 3aG3Tjiu*mti toDnmgtfjxa iaift J^Sl^il "if, 2^249 

 '■ ■"•;•.• Mean : ■.' 77'5 ,., 2*288 

 Binoxalate of Ammonia, NH4O, Cg O3 + HO, Cg O3 4- 2HO 

 f^ 125*69. — 31*42 grains of this salt, dissolved in lOOOgi'ains 

 of* water, caused in the first experiment an increase of 18*0 at 

 60°; in the second, of 18*2 at 61°; in a third experiment, of 



